| AVS 64th International Symposium & Exhibition | |
| 2D Materials Focus Topic | Thursday Sessions |
| Session 2D+MI-ThM |
| Session: | Novel Quantum Phenomena in 2D Materials |
| Presenter: | Seyedeh Fatemeh Mousavi, University of Basel, Switzerland |
| Authors: | S.F. Mousavi, University of Basel, Switzerland S. Nowakowska, University of Basel, Switzerland A. Wäckerlin, University of Basel, Switzerland I. Piquero-Zulaica, Materials Physics Center, San Sebastián, Spain J. Nowakowski, Paul Scherrer Institut (PSI), Switzerland S. Kawai, University of Basel, Switzerland C. Wäckerlin, Paul Scherrer Institut (PSI), Switzerland M. Matena, University of Basel, Switzerland T. Nijs, University of Basel, Switzerland S. Fatayer, University of Basel, Switzerland O. Popova, University of Basel, Switzerland A. Ahsan, University of Basel, Switzerland T. Ivas, University of Basel, Switzerland E. Meyer, University of Basel, Switzerland M. Stöhr, University of Groningen, Netherlands J.E. Ortega, Materials Physics Center, San Sebastián, Spain J. Björk, Linköping University, Sweden L.H. Gade, Universität Heidelberg, Germany J. Lobo-Checa, Universidad de Zaragoza, Spain T.A. Jung, Paul Scherrer Institut (PSI), Switzerland |
| Correspondent: | Click to Email |
Quantum boxes (QBs) [1] have been arranged in extended 2D arrays by the self-assembled formation of a porous on-surface coordinated network [2]. Xe atoms were used as an adsorbate for their well-defined interaction with the surface state electrons of Cu(111), which is dominated by Pauli repulsion. The electronic states contained in these arrays can be configured by the localized perturbation by the targeted filling level of the individual QBs with Xe atoms after Xe repositioning, each quantum box exhibits maximal 12 filling levels, which incrementally perturb the quantum box state(s) via Pauli repulsion. It is shown that specific filling patterns of the network of the QBs which are coupled in an inherently precise way by self assembly [3] specifically perturb, and thus modify the localized and delocalized quantum box states (QBSs). In particular the energy levels of the QBSs is modulated also it is demonstrated that the inter-box coupling can be sustained or significantly weakened by an appropriate arrangement of empty and filled boxes. We gain unprecedented insight into the physics of interacting quantum states on the local level as well as in their cooperative interaction by using complementary scanning tunneling microscopy/spectroscopy (STM/STS) and angle-resolved photoemission spectroscopy (ARPES) measurements. Our approach establishes that such self-assembled two-dimensional quantum box architectures may serve as nanoscale analog of breadboards that are commonly employed in electronic circuitry and guide towards the fabrication of quantum devices.
References
[1] S. Nowakowska et al., Nature Communications | 6:6071 | DOI: 10.1038/ncomms7071
[2] J. Lobo Checa et al., Science 325, 17, 300ff (2009)
[3] S. Nowakowska et al, small, 2016; DOI: 10.1002/smll.201600915..